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//
// Copyright 2010 Ettus Research LLC
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
//
#include "libusb1_base.hpp"
#include <uhd/utils/assert.hpp>
#include <iostream>
using namespace uhd::transport;
/**********************************************************
* Helper Methods
**********************************************************/
/*
* Check for FSF device
* Compare the device's descriptor Vendor ID
* \param dev pointer to libusb_device
* \return true if Vendor ID matches 0xfffe
*/
bool check_fsf_device(libusb_device *dev)
{
libusb_device_descriptor desc;
if (libusb_get_device_descriptor(dev, &desc) < 0) {
UHD_ASSERT_THROW("USB: failed to get device descriptor");
}
return desc.idVendor == 0xfffe;
}
/**********************************************************
* libusb namespace
**********************************************************/
void libusb::init(libusb_context **ctx, int debug_level)
{
if (libusb_init(ctx) < 0)
std::cerr << "error: libusb_init" << std::endl;
libusb_set_debug(*ctx, debug_level);
}
std::vector<libusb_device *> libusb::get_fsf_device_list(libusb_context *ctx)
{
libusb_device **libusb_dev_list;
std::vector<libusb_device *> fsf_dev_list;
ssize_t dev_cnt = libusb_get_device_list(ctx, &libusb_dev_list);
//find the FSF devices
for (ssize_t i = 0; i < dev_cnt; i++) {
libusb_device *dev = libusb_dev_list[i];
if (check_fsf_device(dev))
fsf_dev_list.push_back(dev);
else
libusb_unref_device(dev);
}
libusb_free_device_list(libusb_dev_list, 0);
return fsf_dev_list;
}
libusb_device_handle *libusb::open_device(libusb_context *ctx,
usb_device_handle::sptr handle)
{
libusb_device_handle *dev_handle = NULL;
std::vector<libusb_device *> fsf_dev_list = get_fsf_device_list(ctx);
//find and open the USB device
for (size_t i = 0; i < fsf_dev_list.size(); i++) {
libusb_device *dev = fsf_dev_list[i];
if (compare_device(dev, handle)) {
libusb_open(dev, &dev_handle);
libusb_unref_device(dev);
break;
}
libusb_unref_device(dev);
}
return dev_handle;
}
bool libusb::compare_device(libusb_device *dev,
usb_device_handle::sptr handle)
{
std::string serial = handle->get_serial();
boost::uint16_t vendor_id = handle->get_vendor_id();
boost::uint16_t product_id = handle->get_product_id();
boost::uint8_t device_addr = handle->get_device_addr();
libusb_device_descriptor libusb_desc;
if (libusb_get_device_descriptor(dev, &libusb_desc) < 0)
return false;
if (serial != get_serial(dev))
return false;
if (vendor_id != libusb_desc.idVendor)
return false;
if (product_id != libusb_desc.idProduct)
return false;
if (device_addr != libusb_get_device_address(dev))
return false;
return true;
}
bool libusb::open_interface(libusb_device_handle *dev_handle,
int interface)
{
int ret = libusb_claim_interface(dev_handle, interface);
if (ret < 0) {
std::cerr << "error: libusb_claim_interface() " << ret << std::endl;
return false;
}
else {
return true;
}
}
std::string libusb::get_serial(libusb_device *dev)
{
unsigned char buff[32];
libusb_device_descriptor desc;
if (libusb_get_device_descriptor(dev, &desc) < 0)
return "";
if (desc.iSerialNumber == 0)
return "";
//open the device because we have to
libusb_device_handle *dev_handle;
if (libusb_open(dev, &dev_handle) < 0)
return "";
if (libusb_get_string_descriptor_ascii(dev_handle, desc.iSerialNumber,
buff, sizeof(buff)) < 0) {
return "";
}
libusb_close(dev_handle);
return (char*) buff;
}
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